Water Lettuce likes full sun outside. Main thing to remember about light is MORE!
Fill your tank with plants and use pressure co2 with a DC and you will greatly reduce the water quality checks and water changes.
You will be better off with a T5HO light set up. I have a 3 bulb set up with 6700k bulbs and have 4 lunar LED strips that are always on to bring out the
Yea I agree there isn't much room in a 2 gallon unfortunately. Although I did come up with two ideas: Either 1 male dwarf gourami, or 4-6 neon tetras.
I'm wondering if the flow from the filter is just too high for the harleys right now.. they were playing in it last week, and i may have bumped it up